Chi Wen is a 29 year old man who runs a market stall in Side Scroll. He appears in the second Story Mode level but is not unlockable.
Chi Wen LOVES motorbikes, nearly as much as he loves Klo Wen ... at least that's what he tells everyone ... anyway, he is massive biking fan and enjoys spending his free time working with bikes. He is also married to Klo and they live in a house just off the market square so setting up their stalls are easy to do. On their stall, they sell various bits and pieces, which may just come in handy for you.